Cartesian Coordinates are read from the origin (0,0).
They are in order of x-coordinate (horizontal) and y-coordinate (vertical).
In brain surgery, accuracy is important. In this brain x-ray, the coordinates of brain parts are:
This is an x-ray of a pregnant woman with a baby in her womb. The x-axis goes across her lower belly where the surgeon will perform a Caesarean section to give birth to the baby. The y-axis is the woman's backbone. The coordinates of points are:
In the Cartesian plane of the pregnant woman's x-ray above, write the coordinates of the:
B = ( 3.7 , 1.7 )
D = ( –5 , 6.7 )
Cartesian planes are named after 17th century French mathematician and philosopher Rene Descartes whose writings were prohibited by the Roman Catholic Pope. His famous line was "I think, therefore I am". In Latin, this is "Cogito ergo sum".